RUSLE2 Calculator for Construction Sites
RUSLE2 (Revised Universal Soil Loss Equation) is the standard method for estimating soil erosion on construction sites, and it is required for SWPPP compliance under the California Construction General Permit. It combines five site factors into an average annual soil loss number in tons per acre per year.
Pulling those factors together by hand is slow and time-consuming. Rapid RUSLE gathers the inputs and runs the calculation for you, so you get a compliance-ready number in minutes.
How RUSLE2 Is Calculated
RUSLE2 multiplies five factors to estimate average annual soil loss. Each factor captures one driver of erosion, from climate to ground cover.
A = R × K × LS × C × P
A is the estimated average annual soil loss, in tons per acre per year.
Rainfall erosivity
The erosive energy and intensity of rainfall and runoff over a year. Higher in wetter, higher-intensity climates. Rapid RUSLE pulls it from NOAA climate data for your project dates.
Soil erodibility
How easily a soil detaches and washes away, based on texture, organic matter, structure, and permeability. Values run from about 0.02 (resistant) to 0.69 (highly erodible), read from SSURGO soil surveys.
Slope length and steepness
Longer and steeper slopes erode more. Computed from USGS elevation data for your disturbance area.
Cover management
Reflects surface cover and stabilization. Near 1.0 for bare, disturbed soil, and it drops as seeding, mulch, and other BMPs go in.
Support practice
Credit for erosion control practices such as silt fence, fiber rolls, and contouring. 1.0 with no practices in place, lower as practices are applied.
Multiply the five factors to get A. California's Construction General Permit uses the result to classify a site's sediment risk as Low, Medium, or High.
Automate Every RUSLE2 Factor
Instead of manually looking up tables and interpolating maps, enter your project address or upload a KMZ boundary. Rapid RUSLE fetches and computes every input automatically, then generates your compliance outputs in seconds.
- Automatic R factor from NOAA climate data based on your project dates
- K factor pulled from SSURGO soil surveys for your exact site location
- LS factor computed from USGS elevation data for your disturbance polygon
- CGP sediment risk classification (Low, Medium, High) generated instantly
- Receiving water risk cross-referenced with impaired water body datasets
- PDF export formatted for SWPPP appendices and regulatory review
Ready to automate your RUSLE2 calculations?
Join QSDs and environmental consultants who use Rapid RUSLE to produce SWPPP-ready erosion calculations in minutes instead of hours.
Two full-featured projects free. No credit card required.